Belt elevatoe aud conveyer



F. MARSTON.

BELT ELEVATOR AND CONVEYER.

APPLICATIONAFILED APR-8.1914.

Patented Aug. 8, 1916.

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FREDERICK MABSTON, OF EL PASG, TEXAS.

BELT ELEVATOR AND CONVEYER.

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Specification of Letters Patent.

Patented Aug. 8, 1916.

Application filed April 8, 1914. Serial No. 830,413.

To all whom it may concern Be it known that I, FREDnRioK MARsToN, a citizen of the United States, residing at El Paso, in the county of El Paso and State of Texas, have invented a new and useful Improvement in Belt Elevators and Conveyers of which the following is a specification.

This invention relates to certain improve ments in conveyors and has relation more particularly to a bucket conveyer wherein the belt is guided around crowned pulleys, and an object of the invention is to provide a device of this general character wherein the inner surface of the belt is curved transversely in order to conform to the periphery of the pulleys in order to assure a maximum of frictional engagement.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved conveyer whereby certain important advantages are attained and the device is rendered simpler, less expensive and otherwise more convenient and advantageous for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the appended claims.

In order that my invention may be the better understood, 1 will now proceed to describe the same with reference to the accompanying drawings, wherein Figure 1 is a view partly in elevation and partly in section, illustrating a general form of conveyer coacting with the crowned pulley; Fig. 2 is a view partly in elevation and partly in section illustrating a conveyer constructed in accordance with an embodiment of my invention; and Fig. 3 is a view partly in elevation and partly in section illustrating a modified form of my invention.

As disclosed in the accompanying drawings, 1 denotes a belt adapted to pass around the crowned pulley 2, and 3 denotes a bucket secured to the outer surface of the belt through the medium of the conventional bolts 4 and their coacting nuts 5, the heads of the bolts being disposed inwardly of the belt and flush with the inner face thereof while the nuts 5 are positioned within the bucket 3. The bolts 4 are arranged preferably at the transverse center of the inner face 6 of the bucket and adjacent the oppobelt immediately behind the bucket is arranged substantially rigid and non-yielding and of a uniformity in shape.

As particularly disclosed in Fig. 2, the lnner face 6 of the bucket 3 is curved transversely concentric to the transverse curvature of the pulley 2, whereby it will be perceived that a similar curvature will be imparted to the belt 1, whereby it is assured that an engagement possessing a maximum of efliciency may be had between the pulley 2 and the belt 1.

As illustrated in Fig. 3, the bucket 3 and belt 1 have interposed therebetween a liner plate 7 the outer face 8 whereof being curved transversely concentric to the curvature of the crowned pulley 2, while th bolts 4 together with the coacting nuts 5 serve to maintain the belt 1, liner 7 and bucket 3 in operative engagement. It will also be observed that the outer face of the liner plate 7 serves to give the belt 1 the requisite transverse curvature to properly engage the periphery of the crowned pulley 2. v

The advantages of my invention as illustrated in Figs. 2 and 3 of the accompanying drawings are thought to be made apparent by the disclosure contained in Fig. l'wherein a conventional bucket conveyer is employed wherein it will be observed that the rear face of the bucket B is straight, which results in the engagement of the belt A with the pulley P with the minimum of efliciency.

From the foregoing description it is thought to be obvious that a conveyer constructed in accordance with my invention is of an extremely simple and comparatively inexpensive nature, and is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and by reason of the effectiveness with which it performs its functions, and it will also be obvious that my invention is susceptible of some change and modification without material departure from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown of my invention in practice.

I claim:

1. In combination with a crowned wheel, a belt adapted to be disposed therearound, a bucket secured to the belt, the contacting face of the bucket being disposed on a curve concentric to the transverse curvature of the periphery of th'e'crowned wheel whereby the belt is disposed on a corresponding transverse curvature and means for rigidly connecting the contacting face of the bucket and'the adjacent portion of the belt.

' 2. In combination With a crowned Wheel, a belt adapted to be disposed therearound, a bucket having its back face secured to the belt, said back face of the bucket being concaved to conforinto the transverse curvature of the periphery of the crowned wheel, bolts disposed through the back face of the bucket and the adjacent portion of the belt, said bolts being positioned at substantially the transverse center of the back and adjacent opposite margins thereof, the heads of the bolts being arranged inwardly of the belt and flush with the inner face thereof, and clamping nuts engaged With'the extremities of the bolts Within the bucket.

FREDERICK MARSTON. Witnesses:

Gno. L. FISHER, OLIVER B. DAWSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

